作者:Anders Dahlén、Göran Hilmersson
DOI:10.1002/chem.200390129
日期:2003.3.3
reductions of ketones, imines, and alpha,beta-unsaturated esters have been shown to be instantaneous in the presence of H(2)O and an amine in THF. The SmI(2)-mediated reductions are not only shown to be fast and quantitative by the addition of H(2)O and an amine, but the workup procedures are also simplified. Competing experiments with SmI(2)/H(2)O/amine confirmed that alpha,beta-unsaturated esters could
SmI(2)介导的酮,亚胺和α,β-不饱和酯的还原反应已显示在THF中存在H(2)O和胺的情况下是瞬时的。通过添加H(2)O和胺,不仅显示出SmI(2)介导的还原反应快速,定量,而且简化了后处理程序。与SmI(2)/ H(2)O /胺进行的竞争性实验证实,在存在酮或亚胺的情况下,α,β-不饱和酯可被选择性还原。比较类似的配体表明,在这些还原中,氮和磷配体优于氧和硫配体。三烷基膦1,2-双(二甲基膦基)乙烷(DMPE)提供了主要的动力学同位素效应,得出ak(H)/ k(D)为4.5。